[Freeswitch-users] One way audio only in a specified context

Hello everybody, I have a problem with a FS installed on the cloud (configured following Freeswitch EC2 Wiki). Everything is ok except a one way audio behaviour that i have only if i transfer an outbound call. If I transfer an inbound call I don't have this problem. I'll explain the scenario with a little schema INBOUND CALL -> Extension 100 -> transfer to 101 WORKS. Extension 100 -> OUTBOUND CALL -> transfer to 101 ONE WAY AUDIO. I have one snom 300 (extension 100) and 3 Gigaset A510IP behind a tomato router. Can someone suggest me some way to manage this issue? Thanks in advice crazygabry